RADIOPHARMACEUTICALS
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| Radiopharmaceuticals,redioactive-substance |
Radiopharmaceuticals-:
Radiopharmaceuticals are
pharmaceutical formulations consisting
of radioactive substances
which are intended
for use in medicine
(either in diagnosis or therapy
of disease).
Any
nucleotide which is not radioactive in nature is regarded as stable. To be
stable, a nuclide may possess appropriate energy. Those nuclides
which undergo spontaneous
nuclear change so
as to attain stability
by emitting radiations
are called as
radionuclides or radioisotopes.
The
elements are known as radioactive because they are unstable and undergo
decomposition along with emission of radiations or rays. Forty radioactive
elements are known which are arranged as Uranium series, Thorium series and
Actinium series.
The use of radioactive material necessitates
careful and safe handling of these products by trained and authorized
personnel, in approved/authorized laboratory facility as per the guide lines of
Atomic Energy Regulatory Board (AERB) of India.
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| Radiopharmaceuticals,redioactive, |
Isotopes-:
Atoms of an element which have same atomic no.
but different mass no. are called isotopes. Isotopes of an element have the
same number of protons but different numbers of neutrons, thus exhibit same chemical
properties and occupy the same position in periodic table.
The number
of protons within theatom's nucleusis called atomic
number and is equal to the number of electron sin the
neutral (non-ionized) atom.
Each
atomic number identifies a specific element, but not the isotope; an atom of a
given element may have a wide range in its number of neutrons. The number of nucleons
(both protons and neutrons) in the nucleus is the atom's mass number, and each
isotope of a given element has a different mass number.
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